What is Derriere Repair?

My name is Howard Waldstriecher and I am the owner of HalfHourPower, one of the leading fitness studios in Denver. This is THE program that has helped busy professionals LOSE the "droopy booty" (even with a hectic schedule).

Derriere Repair utilizes the exclusive methods that I've used over the years to train the world's top athletes. Stream Derriere Repair on your laptop, desktop, mobile device, or TV!

I have helped the top professionals,
and I will help you.

Skip the trip to the gym TODAY!



  • Instant Access To Videos After Purchase

  • Two unique, follow-along workout routines ($50 value)

  • Custom PowerBand that I use in my studio classes and with all my athletes ($20 value)

  • BONUS! I include my new abdominal exercise to reduce and tone your midsection ($20 value)

  • An expert trainer to guide you ($100 value, but priceless!)

  • Personal Service. Email me your questions anytime.

  • Free Shipping


I have worked with some of the top athletes in the world…
and now I'm offering you the same experience.

a trainer you can trust


Since developing HalfHourPower, I have trained some of the world’s finest athletes in the prime of their careers

But my greatest joy is seeing how the program helps so many busy and active professionals. With HalfHourPower, these people eliminated the aches and pains that they thought were just part of the aging process. HalfHourPower gave them the energy and fitness to make the most of their busy lives.

HalfHourPower gave them results.

Many people believe that they need a gym, weights, an hour or more, and endless cardio to get the results. You don’t need any of that.

You can accomplish all you need with HalfHourPower - quickly, effectively and safely.

Whether you come in to one of my studios here in Denver or order Derriere Repair, you’ll find a workout that fits into your life and enhances everything you do. You will change your body. Guaranteed.

real people. real results.


Stream Derriere Repair on your laptop, desktop, mobile device, TV and more


Apple TV, Roku, Fire TV
Chromecast, Android
iPad, iPhone, iPod
laptop or desktop